{"schemaVersion":3,"id":"CVE-2013-4314","aliases":["MGASA-2013-0277","GHSA-6748-36qp-fx6r","PYSEC-2013-31","DEBIAN-CVE-2013-4314","DSA-2763-1","openSUSE-SU-2024:14154-1","openSUSE-SU-2026:11470-1"],"status":"published","duplicateOf":null,"title":null,"description":"The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.","dates":{"published":"2013-09-30T21:00:00.000Z","modified":"2024-08-06T16:38:01.984Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Pypi","score":8.7,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true}]},"epss":{"probability":0.01197,"percentile":0.67833,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.01197},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01197,"percentile":0.67833}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01197,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.01197,"percentile":0.67833}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"}],"affected":[{"vendor":"canonical","product":"ubuntu_linux","name":"ubuntu linux","label":"ubuntu_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"10.04","noFixRecorded":false,"fixedIn":null},{"text":"12.04","noFixRecorded":false,"fixedIn":null},{"text":"12.10","noFixRecorded":false,"fixedIn":null},{"text":"13.04","noFixRecorded":false,"fixedIn":null}],"versionsText":"10.04 | 12.04 | 12.10 | 13.04","eol":{"isEol":true,"eolDate":"2013-05-09T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"10.04","label":"10.04 'Lucid Lynx' (LTS)","eolFrom":"2013-05-09T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"10.04.4"},"product":{"name":"ubuntu","label":"Ubuntu","category":"os"}},"hubHref":"/vendor/canonical/ubuntu_linux"},{"vendor":"debian","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/pyopenssl","purlType":"deb","versions":[{"text":"< 0.13-2.1","noFixRecorded":false,"fixedIn":null},{"text":"< 0.10-1+squeeze1","noFixRecorded":false,"fixedIn":null},{"text":"< 0.13-2+deb7u1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.13-2.1 | < 0.10-1+squeeze1 | < 0.13-2+deb7u1","eol":null,"hubHref":null},{"vendor":"jean-paul_calderone","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 0.13","noFixRecorded":false,"fixedIn":null},{"text":"0.7","noFixRecorded":false,"fixedIn":null},{"text":"0.8:a1","noFixRecorded":false,"fixedIn":null},{"text":"0.9","noFixRecorded":false,"fixedIn":null},{"text":"0.10","noFixRecorded":false,"fixedIn":null},{"text":"0.11","noFixRecorded":false,"fixedIn":null},{"text":"0.11:a1","noFixRecorded":false,"fixedIn":null},{"text":"0.11:a2","noFixRecorded":false,"fixedIn":null},{"text":"0.12","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 0.13 | 0.7 | 0.8:a1 | 0.9 | 0.10 | 0.11 | 0.11:a1 | 0.11:a2 | 0.12","eol":null,"hubHref":"/vendor/jean-paul_calderone/pyopenssl"},{"vendor":"mageia","product":"python-OpenSSL","name":"python-OpenSSL","label":"python-OpenSSL","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/python-OpenSSL","purlType":"rpm","versions":[{"text":"< 0.12-1.1.mga2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.12-1.1.mga2","eol":null,"hubHref":null},{"vendor":"mageia","product":"python-OpenSSL","name":"python-OpenSSL","label":"python-OpenSSL","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/python-OpenSSL","purlType":"rpm","versions":[{"text":"< 0.13-2.1.mga3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.13-2.1.mga3","eol":null,"hubHref":null},{"vendor":"PyPI","product":"pyopenssl","name":"pyopenssl","label":"pyopenssl","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/pyopenssl","purlType":"pypi","versions":[{"text":"< 0.13.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.13.1","eol":null,"hubHref":null},{"vendor":"opensuse","product":"python-pyOpenSSL&distro=openSUSE Tumbleweed","name":"python-pyOpenSSL","label":"python-pyOpenSSL&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/python-pyOpenSSL&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 24.1.0-1.2","noFixRecorded":false,"fixedIn":null},{"text":"< 26.4.0-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 24.1.0-1.2 | < 26.4.0-1.1","eol":null,"hubHref":null}],"affectedCount":7,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.debian.org/security/2013/dsa-2763","label":"www.debian.org/security/2013/dsa-2763","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN","WEB","Advisory"]},{"url":"https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html","label":"mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html","hostname":"mail.python.org","tags":["Mailing List","X Refsource MLIST","WEB"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1005325","label":"bugzilla.redhat.com/show_bug.cgi?id=1005325","hostname":"bugzilla.redhat.com","tags":["X Refsource CONFIRM","REPORT","WEB"]},{"url":"http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html","label":"lists.opensuse.org/opensuse-updates/2013-11/msg00015.html","hostname":"lists.opensuse.org","tags":["Vendor Advisory","X Refsource SUSE","WEB"]},{"url":"http://www.openwall.com/lists/oss-security/2013/09/06/2","label":"www.openwall.com/lists/oss-security/2013/09/06/2","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","WEB"]},{"url":"http://www.ubuntu.com/usn/USN-1965-1","label":"www.ubuntu.com/usn/USN-1965-1","hostname":"www.ubuntu.com","tags":["Vendor Advisory","X Refsource UBUNTU","WEB","Advisory"]},{"url":"https://advisories.mageia.org/MGASA-2013-0277.html","label":"advisories.mageia.org/MGASA-2013-0277.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=11206","label":"bugs.mageia.org/show_bug.cgi?id=11206","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4314","label":"nvd.nist.gov/vuln/detail/CVE-2013-4314","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2","label":"github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/pyca/pyopenssl","label":"github.com/pyca/pyopenssl","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml","label":"github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/advisories/GHSA-6748-36qp-fx6r","label":"github.com/advisories/GHSA-6748-36qp-fx6r","hostname":"github.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2013-4314","label":"security-tracker.debian.org/tracker/CVE-2013-4314","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4314","label":"www.suse.com/security/cve/CVE-2013-4314","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2013-09-30T21:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-06T16:38:01.984Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":17,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T09:33:36.487Z","stale":false,"partial":false}}